For Cat(herine) Halloran B 1826 (exact), Co. Laois, with the father's forename unknown, I found 2 rcds: 1826 Camross, and 1826 Mountmellick RC parishes. Father's respective forenames were ? and Philip.
For Cat(herine) Halloran M 1847 +/- 5 yrs, Co. Laois, I found 0 rcds within a relevant range. They may have married elsewhere. For elsewhere in Ireland, I found 12 rcds: 2-1843 TIP, 1843 OFF, 1845 LIM, 4-1846 LIM, 1848 CRK, 1850 TIP, 1851 CRK, 1851 TIP and 1852 TIP (Borrisokane).
For Ric(hard) Cornwall M ditto, I found 1 rcd, 1852 TIP, Borrisokane. The M rcds are highly likely to be for these ancestors.
For ???? Cornwall B 1852-1859, somewhere in Ireland, with a father forenamed Ri(chard), I found 0 rcds. This infers the rcds: 1) didn't survive. 2) haven't been transcribed. or they were born elsewhere, perhaps Canada.
Note - there are NO church/civil parishes named Burrows. There is one for each named Durrow.